hunting the session error

psi-probe-core/src/main/java/psiprobe/ProbeSecurityConfig.java

@@ -30,6 +30,8 @@
 import org.springframework.security.access.vote.RoleVoter;
 import org.springframework.security.authentication.AuthenticationProvider;
 import org.springframework.security.authentication.ProviderManager;
+import org.springframework.security.config.annotation.web.builders.HttpSecurity;
+import org.springframework.security.config.annotation.web.builders.WebSecurity;
 import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
 import org.springframework.security.core.authority.mapping.SimpleAttributes2GrantedAuthoritiesMapper;
 import org.springframework.security.web.DefaultSecurityFilterChain;
@@ -306,4 +308,14 @@ public XStream getXstream() {
     return xstream;
   }
 
+  @Override
+  protected void configure(HttpSecurity http) throws Exception {
+    http.sessionManagement().disable();
+  }
+
+  @Override
+  public void configure(WebSecurity web) throws Exception {
+    web.debug(true);
+  }
+
 }

psi-probe-core/src/main/java/psiprobe/SessionCounterListener.java

@@ -0,0 +1,38 @@
+/**
+ * Licensed under the GPL License. You may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   https://www.gnu.org/licenses/old-licenses/gpl-2.0.html
+ *
+ * THIS PACKAGE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+ * WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE.
+ */
+package psiprobe;
+
+import javax.servlet.annotation.WebListener;
+import javax.servlet.http.HttpSessionEvent;
+import javax.servlet.http.HttpSessionListener;
+
+@WebListener
+public class SessionCounterListener implements HttpSessionListener {
+
+    private static int totalActiveSessions;
+
+    public static int getTotalActiveSession(){
+      return totalActiveSessions;
+    }
+
+    @Override
+    public void sessionCreated(HttpSessionEvent arg0) {
+      totalActiveSessions++;
+      System.out.println("sessionCreated - add one session into counter");
+    }
+
+    @Override
+    public void sessionDestroyed(HttpSessionEvent arg0) {
+      totalActiveSessions--;
+      System.out.println("sessionDestroyed - deduct one session from counter");
+    }
+
+}